<!DOCTYPE html>
<html lang="en">
    <head>
        <meta charset="UTF-8">
        <meta name="viewport" content="width=device-width, initial-scale=1.0">
        <meta http-equiv="X-UA-Compatible" content="ie=edge">
        <title>Document</title>
        <script src="./lib/vue-2.4.0.js"></script>
        <link rel="stylesheet" href="./lib/bootstrap-3.3.7.css">
    </head>
    
    <body>
        <div id="app">
            <input type="button" value="获取元素" @click="getElement" ref="button">
            <h3 id="myh3" ref="myh3">哈哈哈，今天天气太好了</h3>

            <hr>

            <login ref="mylogin"></login>
        </div>

        <script>
            var login = {
                template: '<h1>登录组件</h1>',
                data() {
                    return {
                        msg: 'son msg'
                    }
                },
                methods: {
                    show() {
                        console.log('调用了子组件的方法');
                    }
                }
            }

            var vm = new Vue({
                el: '#app',
                data: {

                },
                methods: {
                   getElement() {
                    //    console.log(document.getElementById('myh3').innerText)

                    // ref 是 英文单词 [reference] 的缩写
                    // console.log(this.$refs.myh3.innerText)

                    console.log(this.$refs.mylogin.msg);
                    this.$refs.mylogin.show();
                   }
                },
                components: {
                    login
                }
            });
        </script>
    </body>
</html>